Fusible link



Filed Dec. 19, 1919 Patented May 29,

lVILLIAlP/I H. O15 D/LONTREAL, QUEBEC, CANADA.

rnsrnnn LINK.

Application filedlhceinber 19, 1919. Serial No. 346,003.

To (/ZZ ill/10127, it may CORK/77171.

Be it known that l. umen: ll. Barren,

a citizen of the United ritates, anr of the city of ll lontreal, in the Province of "minion of Canada, have in- Improvements Quebec and 1 ll vented certain new and use rul resident in Fusihle Links. of which the following is a full. clear,

This invention relates to im.

nd enact description.

prevements in fusible links such as are used. in sprinkler heads and the like.

and the object of the in vcntion is to provide a link which may be cheaply and easily manufactured and durable and etlicient in operation.

further ob ect is con to provide a link so .ructed that upon elongating" move nent,

the link parts will simultaneously move away from one another in the flatwise direction. A still further ob ect 1s to provide a twopart link.

The device consists briefly similar plates, each having of a pair of an integral tongue lying at an inclination to the plate surface and adapted to slidably support a corresponding tongue of the other plate.

In the drawings which illustrate the invention Fig. 1 is a plan View of a link formed according to this invention.

Fig. 2 is a longitudinal central section of the link.

Referring more particularly to the drawinns, 11 and 12 designate a pair of similar plates each having toward one end an attachment aperture 13 and at the opposite end a notch 14 adapted to expose the aperture of the other plate.

Each link is provided with a centrally disposed aperture 15, the metal removed from the aperture being allowed to remain integral with the plate in the form of a tongue 16. This tongue is bent outwardly from the plate and then bent upon itself at 17. so as to provide a portion 18 projecting through the aperture 15.

These tongue )arts 18 are arran ed in lanes extendinej transversely of the plates and with the plane of the plate.

out of normal As shown, in

Figure 2, the plane of each tongue part 18 is at an angle of approximately sixty degrees to the plane of the plate, but it will be understood that the invention is not con fined to this or to any specific angle within the range of practicability. The plates are assembled as tongue tip of shown in Figure 2 with the each plate projecting through.

the opening 15 of the other plate' and the ton ue tips in sliding contact with one another. The plates are then connected in the usual. manner by solder of any desired temperature. lustration the the drawing, known in the The bend 1.

For the purposes of clear ilsolder has been omitted from its disposition is so well art.

ch tongue should have suiiiciently lar e radius, so that the metal of the tongue will not be cracked or in any way weakenhd by time the radius must be sulliciently short, so'

the bending and at the same that the tendency to spring;- is practicallynil under the load to which the llnk is subjected. in order to obtain requisite strength and stiffness. it is of the tongue 17 as nearly advisable to keep the portion between its root and the bend in the plane of the plate as possible having regard to proper bearing surface between the tongues when the link is assembled. of the tongue The angle between the plane parts 18 and the plate should be such that there will be considerable slid- 111,9: tendency between the tongues when the link is assembled and in tension. This slidinn tendency must not, however, be greater than the strength of the solder will resist for an indefinite period. On the other hand,

the plane of the tongues must not be so nearly perpendicular to the plane of the plates that there will be any marked resistance to the sliding" action of the tongues.

The operation of the device is extremely simple. clined tongue lVhen the link is in tension the intip 18 of one plate is drawn toward the inclined tongue tip of the other plate.

Owing to the inclination of these tips, they have a tendency to slide in opposite directions and thus force the plates flatwise apart.

tion is resisted by the solder connecting the Normally. this separating acprodu ees an i of the link and precludes any possibility of nstantaneous break or opening the link elongating" slightly by a wiping: or sliding movement and then becomm chilled. The inclined tongues not only produce the desired plate separation but also relieve the solder connecting the plates of practically all shearing stress.

10 Willi-n all p'robability'be solid.

Having thus described my invention, what I claim isz v 1. In a deviceof the class described, a pai of apertured plates each' having a tongue 15 projecting through the aperture of the other plate and into sliding contact with the other tongue.

2'. A device "of the class described comprising a pair of plates, a tongue struck 20 from each plate and forming an'aperture in my hand.

the plate, said tongue being first bent away from the plate and then upon itself to pass through the aperture of the plate carrying it and into the aperture of the other plate, said tongues being disposed at an angle other than 90 degrees to the pla tesurface and arranged in sliding engagement with one another. i v v 8. In a device of the class described, a pair of apertured plates in sliding contact with one another, each of said plates carrying a' tongue projectingg'through the aperture of the other plate, said tongues being in engagement and inclined in the engaging portions, said engaging portions being disposed syn metrically on opposite sides of the plane of contact of the plates. e I

In witnesswhereof, I-have hereunto set WILLIAM H. BAKER. 

